A connector device (1) comprising a first tube member (3) having a first end (5) for engaging the first container and a second end (6) for discharge of fluid from the device (1). The first tube member (3) comprises a first piercing member (9) adapted to allow fluid flow from said first container (22) into said first tube member (3). The first piecing means (9) comprising a shaft extending from an proximal end to a distal end of said piercing member (9), and a pointed head arranged at said proximal end. The pointed head of the first piercing member (9) comprises at least one rib and forming at least a first barb (18). The shaft comprises an oblong slit extending along said shaft between said proximal end and said distal end of said piercing member (9) as well as a first arresting means.
